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Add an mmap() wrapper called GMappedFile. (#148218, David Schleef, Behdad
2005-06-24 Matthias Clasen <mclasen@redhat.com> Add an mmap() wrapper called GMappedFile. (#148218, David Schleef, Behdad Esfahbod) * glib/gmappedfile.[hc]: New files. * configure.in: Check for mmap. * glib/Makefile.am: Add new files. * glib/glib.symbols: Add new functions. * glib/glib.h: Include gmappedfile.h * tests/mapping-test.c: Tests for GMappedFile. * tests/Makefile.am: Add new file.
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Matthias Clasen
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Matthias Clasen
Matthias Clasen
parent
132e20bcb6
commit
748c230205
@@ -77,6 +77,7 @@ test_programs = \
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keyfile-test \
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list-test \
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mainloop-test \
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mapping-test \
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markup-escape-test \
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module-test \
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node-test \
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@@ -133,6 +134,7 @@ keyfile_test_LDADD = $(progs_ldadd)
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list_test_LDADD = $(progs_ldadd)
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mainloop_test_LDADD = $(thread_ldadd)
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markup_test_LDADD = $(progs_ldadd)
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mapping_test_LDADD = $(progs_ldadd)
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markup_escape_test_LDADD = $(progs_ldadd)
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module_test_LDADD = $(module_ldadd) $(module_test_exp)
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module_test_LDFLAGS = $(G_MODULE_LDFLAGS)
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233
tests/mapping-test.c
Normal file
233
tests/mapping-test.c
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@@ -0,0 +1,233 @@
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/* GLIB - Library of useful routines for C programming
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* Copyright (C) 2005 Matthias Clasen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <signal.h>
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#include "glib.h"
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static gchar *dir, *filename, *displayname, *childname;
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static gboolean stop = FALSE;
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static void
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handle_usr1 (int signum)
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{
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stop = TRUE;
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}
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static gboolean
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check_stop (gpointer data)
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{
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GMainLoop *loop = data;
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if (stop)
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g_main_loop_quit (loop);
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return TRUE;
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}
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static void
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write_or_die (const gchar *filename,
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const gchar *contents,
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gssize length)
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{
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GError *error = NULL;
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gchar *displayname;
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if (!g_file_set_contents (filename, contents, length, &error))
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{
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displayname = g_filename_display_name (childname);
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g_print ("failed to write '%s': %s\n",
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displayname, error->message);
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exit (1);
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}
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}
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static GMappedFile *
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map_or_die (const gchar *filename,
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gboolean writable)
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{
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GError *error = NULL;
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GMappedFile *map;
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gchar *displayname;
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map = g_mapped_file_new (filename, writable, &error);
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if (!map)
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{
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displayname = g_filename_display_name (childname);
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g_print ("failed to map '%s' non-writable, shared: %s\n",
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displayname, error->message);
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exit (1);
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}
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return map;
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}
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static int
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child_main (int argc, char *argv[])
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{
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GMappedFile *map;
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GMainLoop *loop;
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map = map_or_die (filename, FALSE);
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loop = g_main_loop_new (NULL, FALSE);
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signal (SIGUSR1, handle_usr1);
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g_idle_add (check_stop, loop);
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g_main_loop_run (loop);
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write_or_die (childname,
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g_mapped_file_get_contents (map),
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g_mapped_file_get_length (map));
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return 0;
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}
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static void
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test_mapping (void)
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{
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GMappedFile *map;
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write_or_die (filename, "ABC", -1);
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map = map_or_die (filename, FALSE);
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g_assert (g_mapped_file_get_length (map) == 3);
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g_mapped_file_free (map);
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map = map_or_die (filename, TRUE);
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g_assert (g_mapped_file_get_length (map) == 3);
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g_mapped_file_free (map);
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}
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static void
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test_private (void)
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{
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GError *error = NULL;
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GMappedFile *map;
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gchar *buffer;
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gsize len;
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write_or_die (filename, "ABC", -1);
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map = map_or_die (filename, TRUE);
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buffer = (gchar *)g_mapped_file_get_contents (map);
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buffer[0] = '1';
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buffer[1] = '2';
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buffer[2] = '3';
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g_mapped_file_free (map);
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if (!g_file_get_contents (filename, &buffer, &len, &error))
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{
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g_print ("failed to read '%s': %s\n",
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displayname, error->message);
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exit (1);
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}
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g_assert (len == 3);
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g_assert (strcmp (buffer, "ABC") == 0);
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g_free (buffer);
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}
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static void
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test_child_private (gchar *argv0)
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{
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GError *error = NULL;
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GMappedFile *map;
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gchar *buffer;
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gsize len;
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gchar *child_argv[3];
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GPid child_pid;
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write_or_die (filename, "ABC", -1);
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map = map_or_die (filename, TRUE);
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child_argv[0] = argv0;
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child_argv[1] = "mapchild";
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child_argv[2] = NULL;
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if (!g_spawn_async (dir, child_argv, NULL,
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0, NULL, NULL, &child_pid, &error))
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{
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g_print ("failed to spawn child: %s\n",
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error->message);
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exit (1);
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}
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/* give the child some time to set up its mapping */
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sleep (2);
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buffer = (gchar *)g_mapped_file_get_contents (map);
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buffer[0] = '1';
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buffer[1] = '2';
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buffer[2] = '3';
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g_mapped_file_free (map);
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kill (child_pid, SIGUSR1);
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/* give the child some time to write the file */
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sleep (2);
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if (!g_file_get_contents (childname, &buffer, &len, &error))
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{
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gchar *name;
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name = g_filename_display_name (childname);
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g_print ("failed to read '%s': %s\n", name, error->message);
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exit (1);
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}
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g_assert (len == 3);
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g_assert (strcmp (buffer, "ABC") == 0);
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g_free (buffer);
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}
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static int
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parent_main (int argc,
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char *argv[])
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{
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/* test mapping with various flag combinations */
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test_mapping ();
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/* test private modification */
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test_private ();
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/* test multiple clients, non-shared */
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test_child_private (argv[0]);
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return 0;
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}
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int
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main (int argc,
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char *argv[])
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{
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dir = g_get_current_dir ();
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filename = g_build_filename (dir, "maptest", NULL);
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displayname = g_filename_display_name (filename);
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childname = g_build_filename (dir, "mapchild", NULL);
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if (argc > 1)
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return child_main (argc, argv);
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else
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return parent_main (argc, argv);
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}
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